848 research outputs found

    Contribution From Optical Course For The Educational Guidance Of Engineering Careers Students

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    The work shows the fundamental elements of an inclusive educational guidance conception of substantive university processes and results achieved at the Instituto Superior Politécnico José Antonio Echeverría of Havana in the contribution from optical course to develop it for the students in first and second year of the engineering programs, by means of lectures on holography and three-dimensional images of motivation and link with different specialties and the development of experimental facilities and methodology for the construction of holograms and anaglyph by students for engineering applications.9289 IEEE - The Photonics Society,International Commission for Optics (ICO),The Optical Society,The Society of Photo-Optical Instrumentation Engineers (SPIE)Collazo, B., Puentes, M., La orientacin en la actividad pedaggica ¿el maestro, un orientador? (1992) Editorial Pueblo y Educacin, , La HabanaCollazo, B., (2006) Modelo de Tutora Integral Para la Continuidad de Estudios Universitarios en Las Sedes Municipals, , Tesis de doctorado CubaRodrguez, S., (1997) Orientacin Universitaria y Evaluacin de la Calidad. Calidad de la Universidad: Orientacin y Evaluacin, , Apodaca P. y C. Lobato Eds, Barcelona, LaertesEcheverra, B., (1997) Los servicios de orientacin universitarios. Calidad en la universidad: Orientacin y evaluacin, pp. 112-136. , Apodaca P. y C. Lobato (Eds, Barcelona: LaertesMonge, M.C., (2009) Tutora y Orientacin Educative, , Nuevas competencies Las Rozas Wolters KluwerSantana, L.E., (2009) Orientacin Educativa e Intervencin Psicopedaggica Cambian Los Tiempos Cambian Las Responsabilidades Profesionales, , Pirmide MadridVieira, M.J., Vidal, J., Tendencias de la Educacin Superior Europea e implicaciones para la orientacin universitaria (2006) Revista Espaola de Orientacin y Psicopedagoga, 17 (1), pp. 75-97Jaime, R.A., La orientacin educativa como tarea inseparable de la Extensin Universitaria (2011) Revista Cuadernos de Educacin y Desarrollo, 3 (28)Daz, T., La Extensin: Un proceso formativo de la Universidad. Su relacin con otros procesos (2001) Conferencia Magistral Del VI Taller Internacional de Extensin Universitaria, , Memorias, CubaGonzlez, G., (2002) Extensin Universitaria: Una Visin un Cambio Necesario, , Conferencia de la III Convencin Internacional de Educacin Superior, Memorias, CubaOliveira, N., The notorial dynamic analisis of an artificial satellite: A pedagogical experiment in space education (2008) Revista Brasileira de Ensino de Fsica, 30 (1), p. 1401Serra, R., Alfonso, I., Herrera, R., Ferreira, D., Muramatsu, M., Soga, D., (2013) La Fsica y El Trabajo Cientfico Estudiantil en la formación Del Ingeniero Biomdico, , enviado a LAJFE en proceso de arbitraje, eneroSerra, R., (2004) La Utilizacin Del Holograma Como Medio de Enseñanza y de Educacin Social en Cuba A Travs Del Vnculo Investigación-Docencia-Extensin Universitaria, , Tesis Doctoral CubaSerra, R., Moreno, A., Magalhes, D., Muramatsu, M., Lemus, J., Haciendo hologramas en la escuela y en la casa (2010) Revista Brasileira de Ensino de Fsica, 32 (3), p. 3502Zottola, D., Hernndez, A., Serra, R., Anaglifos en la Enseñanza de la ingeniera biomdica (2011) Proc. of v Latin American Congress on Biomedical Engineering, , Haban

    Evaluation of turbulent dissipation rate retrievals from Doppler Cloud Radar

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    Turbulent dissipation rate retrievals from cloud radar Doppler velocity measurements are evaluated using independent, in situ observations in Arctic stratocumulus clouds. In situ validation data sets of dissipation rate are derived using sonic anemometer measurements from a tethered balloon and high frequency pressure variation observations from a research aircraft, both flown in proximity to stationary, ground-based radars. Modest biases are found among the data sets in particularly low- or high-turbulence regimes, but in general the radar-retrieved values correspond well with the in situ measurements. Root mean square differences are typically a factor of 4-6 relative to any given magnitude of dissipation rate. These differences are no larger than those found when comparing dissipation rates computed from tetheredballoon and meteorological tower-mounted sonic anemometer measurements made at spatial distances of a few hundred meters. Temporal lag analyses suggest that approximately half of the observed differences are due to spatial sampling considerations, such that the anticipated radar-based retrieval uncertainty is on the order of a factor of 2-3. Moreover, radar retrievals are clearly able to capture the vertical dissipation rate structure observed by the in situ sensors, while offering substantially more information on the time variability of turbulence profiles. Together these evaluations indicate that radar-based retrievals can, at a minimum, be used to determine the vertical structure of turbulence in Arctic stratocumulus clouds

    ALMA Observations of Asteroid 3 Juno at 60 Kilometer Resolution

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    We present Atacama Large Millimeter/submillimeter Array (ALMA) 1.3 mm continuum images of the asteroid 3 Juno obtained with an angular resolution of 0.042 arcseconds (60 km at 1.97 AU). The data were obtained over a single 4.4 hr interval, which covers 60% of the 7.2 hr rotation period, approximately centered on local transit. A sequence of ten consecutive images reveals continuous changes in the asteroid's profile and apparent shape, in good agreement with the sky projection of the three-dimensional model of the Database of Asteroid Models from Inversion Techniques. We measure a geometric mean diameter of 259pm4 km, in good agreement with past estimates from a variety of techniques and wavelengths. Due to the viewing angle and inclination of the rotational pole, the southern hemisphere dominates all of the images. The median peak brightness temperature is 215pm13 K, while the median over the whole surface is 197pm15 K. With the unprecedented resolution of ALMA, we find that the brightness temperature varies across the surface with higher values correlated to the subsolar point and afternoon areas, and lower values beyond the evening terminator. The dominance of the subsolar point is accentuated in the final four images, suggesting a reduction in the thermal inertia of the regolith at the corresponding longitudes, which are possibly correlated to the location of the putative large impact crater. These results demonstrate ALMA's potential to resolve thermal emission from the surface of main belt asteroids, and to measure accurately their position, geometric shape, rotational period, and soil characteristics.Comment: 8 pages, 3 figures, 2 tables, accepted for publication in the Astrophysical Journal Letter

    Genetic analyses of tropical maize lines under artificial infestation of fall armyworm and foliar diseases under optimum conditions

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    Development and deployment of high-yielding maize varieties with native resistance to Fall armyworm (FAW), turcicum leaf blight (TLB), and gray leaf spot (GLS) infestation is critical for addressing the food insecurity in sub-Saharan Africa. The objectives of this study were to determine the inheritance of resistance for FAW, identity hybrids which in addition to FAW resistance, also show resistance to TLB and GLS, and investigate the usefulness of models based on general combining ability (GCA) and SNP markers in predicting the performance of new untested hybrids. Half-diallel mating scheme was used to generate 105 F1 hybrids from 15 parents and another 55 F1 hybrids from 11 parents. These were evaluated in two experiments, each with commercial checks in multiple locations under FAW artificial infestation and optimum management in Kenya. Under artificial FAW infestation, significant mean squares among hybrids and hybrids x environment were observed for most traits in both experiments, including at least one of the three assessments carried out for foliar damage caused by FAW. Interaction of GCA x environment and specific combining ability (SCA) x environment interactions were significant for all traits under FAW infestation and optimal conditions. Moderate to high heritability estimates were observed for GY under both management conditions. Correlation between GY and two of the three scorings (one and three weeks after infestation) for foliar damage caused by FAW were negative (-0.27 and -0.38) and significant. Positive and significant correlation (0.84) was observed between FAW-inflicted ear damage and the percentage of rotten ears. We identified many superior-performing hybrids compared to the best commercial checks for both GY and FAW resistance associated traits. Inbred lines CML312, CML567, CML488, DTPYC9-F46-1-2-1-2, CKDHL164288, CKDHL166062, and CLRCY039 had significant and positive GCA for GY (positive) and FAW resistance-associated traits (negative). CML567 was a parent in four of the top ten hybrids under optimum and FAW conditions. Both additive and non-additive gene action were important in the inheritance of FAW resistance. Both GCA and marker-based models showed high correlation with field performance, but marker-based models exhibited considerably higher correlation. The best performing hybrids identified in this study could be used as potential single cross testers in the development of three-way FAW resistance hybrids. Overall, our results provide insights that help breeders to design effective breeding strategies to develop FAW resistant hybrids that are high yielding under FAW and optimum conditions

    The Vista Variables in the Via Lactea (VVV) ESO Public Survey: Current Status and First Results

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    25 pages, 18 figures. To appear in the Carnegie Observatories Astrophysics Series, Volume 525 pages, 18 figures. To appear in the Carnegie Observatories Astrophysics Series, Volume 5Vista Variables in the Via Lactea (VVV) is an ESO Public Survey that is performing a variability survey of the Galactic bulge and part of the inner disk using ESO's Visible and Infrared Survey Telescope for Astronomy (VISTA). The survey covers 520 deg^2 of sky area in the ZYJHK_S filters, for a total observing time of 1929 hours, including ~ 10^9 point sources and an estimated ~ 10^6 variable stars. Here we describe the current status of the VVV Survey, in addition to a variety of new results based on VVV data, including light curves for variable stars, newly discovered globular clusters, open clusters, and associations. A set of reddening-free indices based on the ZYJHK_S system is also introduced. Finally, we provide an overview of the VVV Templates Project, whose main goal is to derive well-defined light curve templates in the near-IR, for the automated classification of VVV light curves
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